Pesky White Space error killed my RSS feed again

XML Parsing Error: XML declaration allowed only at the start of the document

Just got my feed back, upgraded to WordPress 3.1.1 and guess what? RSS Feed falls off the face of the earth again . . . And I’ve read other people complaining of the same thing happening at WordPress.Org. It was worth the trip, though.

This guy has answers!

You may not need to do everything he has on his list, mine snapped back with just the editing of my wp-includes/feed-rss2.php file.